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Heraclitus’ river

For anyone keeping things as they are.

c.500 BC · Fragment B12 (via Arius Didymus)

Where it comes from

Heraclitus wrote: “Upon those who step into the same rivers, different and again different waters flow” (fragment B12). The famous “you can’t step in the same river twice” is a later version. Read slowly, he’s saying something stranger: the river stays the same because the water doesn’t.

How to play it

Step in. Then try to keep it exactly as it is.

Pick it up

What it teaches (try it first)

The river stays a river because the water keeps changing. Hold everything still and you don’t keep the river. You get a pond.

Ask yourself. What are you trying to keep the same that only stays alive by changing?

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